Acoustic Emission testing
Leading of acoustic emission equipment providers
Leading of acoustic emission equipment providers
Update time:2013-01-25 09:07 Viewed:次
Power transformer fault are mostly caused by insulation failure, while the existing maintenance and insulation preventive test system has the following:
A. is different test conditions and operating conditions, off-line test can not fully reflect the insulation condition of the equipment under the condition of the running.
B. although insulation fault has development process, but there are different development speed, sudden failure in ehv transformer occupies a considerable proportion in the accident.
C. regular maintenance and preventive test must be a power outage offline, insulation test time is long, workload is big, also can cause equipment damage. So, in the operational conditions for online monitoring of transformer insulation condition.
Partial discharge characteristics is an important index to measure the quality of power transformer insulation system, more than 110 kv power transformer, each have to do in the factory test of partial discharge test. Transformer after the installation, commissioning test, the oil found in the running of air content exceeds bid, in general, to do partial discharge test. At home and abroad in recent years, has developed a variety of test system, used for transformer partial discharge online monitoring, most of them are based on the acoustic emission technology.